中文摘要：

采用基于速度与位移方向的半主动控制算法，用拉索振动方程的差分离散模型对斜拉索与MR阻尼器组成的系统进行面内振动响应的分析。MR阻尼器力学关系选用Spencer现象模型，以斜拉索的位移时程响应的作为减振效果的评价指标。分别分析了拉索在无控、主动、被动及半主动状态下的位移响应，并建立了对应于MATLAB程序的SIMULINK仿真模型。仿真分析结果表明，基于位移和速度方向的半主动控制算法简单有效，并且能取得良好的减振效果，优于被动控制。当MR阻尼器作为被动控制即其输入电压维持在某一特定值时，仍然具有相当于最优被动控制下的最佳制振能力。

英文摘要：

Based on the directions of both the velocity and the displacement, the semi - active .con- trol algorithm was presented. The vibration response in - plane is analyzed by using the difference dis- cretization model of the cable - MR damper system and the semi - active algorithm. MR dampers are ex- plored in detail by using the Spencer phenomenological model. The evaluation index of vibration effect is the displacement of vibration along the whole length of the cable and for the whole period of time. The displacement respond of the cable at the condition of uncontrolled, passive, active and semi - active was analyzed respectively,and the SIMULINK models corresponding to the MATLAB are established： The a- nalysis results show that the velocity and displacement of the semi - active control algorithm is simple and can obtain a good effect of vibration mitigation which is better than the passive control. When the MR damper is in a passive control with a certain voltage,it still has a capacity of vibration mitigation equiva- lent to a passive control.